From an article on disinfopedia:
http://www.disinfopedia.org/wiki.phtml?tit..._E._O'Neill
"Well, there's more about good ol' Margaret," the Kos continues. "She was a lawyer at Vinson & Elkins before she worked for Bush. Vinson & Elkins was Enron's main law firm -- the very firm that facilitated Enron's frauds. Vinson & Elkins was also the firm that spawned Alberto R. Gonzales -- Bush's current general counsel
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Over and over again, it always seems to go back to Enron